CN202939329U - Lens fiber - Google Patents
Lens fiber Download PDFInfo
- Publication number
- CN202939329U CN202939329U CN 201220524184 CN201220524184U CN202939329U CN 202939329 U CN202939329 U CN 202939329U CN 201220524184 CN201220524184 CN 201220524184 CN 201220524184 U CN201220524184 U CN 201220524184U CN 202939329 U CN202939329 U CN 202939329U
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- Prior art keywords
- lens
- fiber
- optically focused
- focused spare
- plane
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- Expired - Lifetime
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Abstract
The utility model discloses a lens fiber which comprises a single-mode fiber and a light condensing part. An end face of single-mode fiber is welded with a front end of the light condensing part which is a multimode fiber. A back end of the light condensing part is a plane, and a lens is formed on the plane. Compared with the prior art, the light condensing part is added, the back end of the light condensing parts is fabricated as the plane, thus light can pass the plane at the back end of the light condensing part from the lens and is gathered in a parabola shape to the end face of the single-mode fiber, and the optical coupling efficiency and coupling displacement tolerance of the lens fiber are effectively improved.
Description
Technical field
The utility model relates to a kind of optical fiber, relates in particular to a kind of lens fiber.
Background technology
Optical fiber is fibre-optic writing a Chinese character in simplified form, be a kind of utilize light in the fiber that glass or plastics are made total reflection principle and the light conduction instrument reached.Optical fiber is mainly to be made of fibre core, covering and overlay; Fibre core is to be made by the material of highly transparent; The refractive index of covering is slightly less than fibre core, thereby causes a kind of optical waveguide effect, most electromagnetic field is bound in fibre core transmits; The effect of overlay is that protection optical fiber is not subjected to the erosion of steam and the scratch of machinery, increases again the pliability of optical fiber simultaneously.Outside overlay, often be added with plastic wrapper.According to the transmission mode quantitative classification in optical fiber, optical fiber can be divided into multimode optical fiber and single-mode fiber again.Multimode optical fiber can adopt step-refraction index to distribute, and also can adopt graded index to distribute; Single-mode fiber adopts step-refraction index to distribute more.Therefore, existing optical fiber can be divided into three kinds of multimode step index optical fiber, multimode graded index fiber and single mode step index optical fibers.
Yet, only dispersing of single-mode fiber output, be unfavorable for being coupled on other devices, make coupling efficiency low, for this reason, with reference to figure 1, prior art is made the end of single-mode fiber 11 coniform, and at cone shape top, lens 12 being set, it is right that scioptics 12 improve the optocoupler of single-mode fiber 11, but this lens fiber 100 does not still reach needed coupling efficiency.
Therefore, be badly in need of a kind of addressing the above problem, effectively improve the optical fiber lens of Single-Mode Fiber Coupling efficient and coupling operating distance tolerance.
The utility model content
The purpose of this utility model is to provide that a kind of coupling efficiency is high, coupling operating distance tolerance wide lens fiber.
For on realizing, purpose is arranged, the utility model discloses a kind of lens fiber, this lens fiber comprises single-mode fiber and optically focused spare, the front end welding of the end face of described single-mode fiber and described optically focused spare, described optically focused spare is multimode optical fiber, and the rear end of described optically focused spare is the plane.
Compared with prior art, the utility model has increased an optically focused spare, and the plane is made in the rear end of optically focused spare, makes the light can be through optically focused spare rear end, be on the parabolic end face that converges to single-mode fiber, effectively improved coupling efficiency and the coupling operating distance tolerance of lens fiber.On the other hand, optical fiber described in the utility model is single-mode fiber, and it can be used for polarization maintaining optical fibre.
Preferably, the rear end of described optically focused spare is perpendicular to the axial vertical plane of optically focused spare.
Preferably, the rear end of described optically focused spare is and favours described optically focused spare axial inclined-plane.
Preferably, described optically focused spare is graded index fiber, like this, makes light through plane or the inclined-plane of optically focused spare rear end, is on the parabolical end face that converges to single-mode fiber, further improves the coupling efficiency that lens are concerned about.
Preferably, be formed with the curved lens of outside surface on the plane of the rear end of described optically focused spare, the area that enters to increase optically focused spare rear end light.
Particularly, described lens are spherical lens.Further, described lens are semisphere.
Particularly, described lens form by a firing the rear end in described optically focused spare.
Particularly, described lens are fused to the rear end of described optically focused spare.
Description of drawings
Fig. 1 is the structural representation of conventional lenses optical fiber.
Fig. 2 is the structural representation of lens fiber described in the utility model.
Fig. 3 is the structural representation of lens fiber described in the utility model the second embodiment.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
With reference to figure 2, be the first embodiment of the present utility model, this embodiment discloses a kind of lens fiber, this lens fiber 200 comprises single-mode fiber 21 and optically focused spare 22, the front end welding of the end face of described single-mode fiber 21 and described optically focused spare 22, described optically focused spare 22 is multimode optical fiber, and the rear end of described optically focused spare 22 is and makes perpendicular to the axial vertical plane of optically focused spare 22.The utility model is made vertical plane with the rear end of optically focused spare 22, make light can pass through from lens the vertical plane of optically focused spare 22 rear ends, be on the funnelform end face that converges to single-mode fiber 21, effectively improved coupling efficiency and the coupling displacement tolerance of lens fiber 200.
The preferably with reference to figure 2, forms spherical lens 23 on the vertical plane of described optically focused spare 22 rear ends, further improve the coupling efficiency of lens fiber 200.
The preferably, with reference to figure 2, described optically focused spare 22 is graded index fiber, namely described optically focused spare 22 therefrom outer its refractive index of mind-set gradually changes, and makes light be on the parabolic end face that converges to single-mode fiber 21 through optically focused spare 22 rear ends.
With reference to figure 3, for the second embodiment of the present utility model, be different from the first embodiment, this embodiment discloses a kind of lens fiber, the rear end of the optically focused spare 22 ' of this lens fiber 200 ' is and favours this optically focused spare 22 ' axial inclined-plane, and forms spherical lens 23 on this inclined-plane.The utility model is the rear end bevel of optically focused spare 22, makes the light can be from the inclined-plane of lens through optically focused spare 22 rear ends, is on the parabolic end face that converges to single-mode fiber 21, effectively improved coupling efficiency and the coupling displacement tolerance of lens fiber 200.
The preferably with reference to figure 3, forms spherical lens 23 on the inclined-plane of described optically focused spare 22 ' rear end, further improve the coupling efficiency of lens fiber 200.
The preferably, with reference to figure 3, described optically focused spare 22 ' is graded index fiber, namely described optically focused spare 22 ' therefrom outer its refractive index of mind-set gradually changes, and makes light be on the parabolical end face that converges to single-mode fiber 21 through optically focused spare 22 ' rear end.
Wherein, described spherical lens 23 forms by a firing or is fused directly in described optically focused spare 22,22 ' rear end.
Above disclosed is only preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (8)
1. lens fiber is characterized in that: comprise single-mode fiber and optically focused spare, and the front end welding of the end face of described single-mode fiber and described optically focused spare, described optically focused spare is multimode optical fiber, and the rear end of described optically focused spare is the plane.
2. lens fiber as claimed in claim 1, it is characterized in that: the rear end of described optically focused spare is perpendicular to the axial vertical plane of optically focused spare.
3. lens fiber as claimed in claim 1 is characterized in that: the rear end of described optically focused spare is and favours described optically focused spare axial inclined-plane.
4. lens fiber as claimed in claim 1, it is characterized in that: described optically focused spare is graded index fiber.
5. lens fiber as claimed in claim 1, is characterized in that: be formed with the curved lens of outside surface on the plane of the rear end of described optically focused spare.
6. lens fiber as claimed in claim 5, it is characterized in that: described lens are spherical lens.
7. lens fiber as claimed in claim 5, it is characterized in that: described lens form by a firing the rear end in described optically focused spare.
8. lens fiber as claimed in claim 5, it is characterized in that: described lens are fused to the rear end of described optically focused spare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524184 CN202939329U (en) | 2012-10-12 | 2012-10-12 | Lens fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524184 CN202939329U (en) | 2012-10-12 | 2012-10-12 | Lens fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939329U true CN202939329U (en) | 2013-05-15 |
Family
ID=48323560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220524184 Expired - Lifetime CN202939329U (en) | 2012-10-12 | 2012-10-12 | Lens fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| CN111839679A (en) * | 2020-07-02 | 2020-10-30 | 武汉理工大学 | Novel intelligent puncture needle used in body and detection system thereof |
-
2012
- 2012-10-12 CN CN 201220524184 patent/CN202939329U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| CN111839679A (en) * | 2020-07-02 | 2020-10-30 | 武汉理工大学 | Novel intelligent puncture needle used in body and detection system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151229 Address after: Pine Road 518000 in Guangdong province Shenzhen City Pingshan New District Industrial Zone No. 56 Woori Electronic Science and Technology Park B building 4 floor Patentee after: PENGDA OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 523000 Guangdong Province, Dongguan city Changan town Xiabian Yincheng Road No. 112 Jianye Building 9 floor Patentee before: Liu He |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
|
| CX01 | Expiry of patent term |